First Joint Observations of Radio Aurora by the VHF and HF Radars of the ISTP SB RAS

Berngardt, O. I.; Лебедев, В. Ф.; Kutelev, K. A.; Kushnarev, Dmitriy; Grkovich, K. V.

doi:10.1007/s11141-018-9832-4

Cited by 2 publications

(3 citation statements)

References 23 publications

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“…The results were obtained by processing more than 500 thousands of RF pulse signals (with signal-to-noise ratio more than 15-20 dB). For every phase difference, RMSE value the confidence interval at significant level of α e = 0,05 [7][8][9][10] is denoted.…”

Section: Comparison Of Theoretical and Experimental Resultsmentioning

confidence: 99%

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Statistical Model of Centimeter Range Signals That Have Passed The Surface and Space Propagation Path

Anikin¹

2018

Proceedings of the International Conference "Actual Issues of Mechanical Engineering" (AIME 2018)

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This article describes the correlation function and the angular energy spectrum of scattered waves for terrestrial paths to distribute radio waves of space propagation path and diffraction. The angular energy spectrum of the scattered waves on such paths is multimodal and causes the periodic nonstationarity of the signals at the outputs of the spaced antennas as the angular position of the narrowly directed antenna of the radio emission source changes. These features take into account the Gaussian model of signals under consideration on the basis of the multimodal angular energy spectrum of scattered waves. Analytical relations, defining conditions for appearance of abnormally large errors in case of receiving signals from radio source with scanning antenna by a direction finder along terrestrial paths, are obtained. It is theoretically proved that it is necessary to compare the phase difference measurement at various bases of the direction finder with a certain threshold in order to detect bearings with abnormally large errors.

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Section: Comparison Of Theoretical and Experimental Resultsmentioning

confidence: 99%

“…In Fig. 4, 5 shows the calculation results for the radio source antenna radiation pattern [5,7,[9][10][11][12][13][14] and the phase correlation coefficient (6) for random mean angles α scatt.1 … α scatt.N from the following conditions:…”

Section: Comparison Of Theoretical and Experimental Resultsmentioning

confidence: 99%

Statistical Model of Centimeter Range Signals That Have Passed The Surface and Space Propagation Path

Anikin¹

2018

Proceedings of the International Conference "Actual Issues of Mechanical Engineering" (AIME 2018)

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“…Consequently, astronomers observe solar radio emissions in the HF-VHF frequency range to study solar activities, the release of energy during solar flares [4] . Furthermore, HF-VHF radio observations are also used to investigate various other astronomical phenomena such as the large-scale high-resolution radiation characteristics of the Milky Way galaxy, surveys of galactic ionized hydrogen distribution, and the time-vary-ing frequency characteristics of transient celestial objects [5][6][7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

HF-VHF dual-channel multifunctional radio astronomy terminal system

Liu,

Dong,

Xie

et al. 2024

Astronomical Techniques and Instrument

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The high frequency-very high frequency (HF-VHF) frequency band is of significant importance in astronomical observations, with applications studying various phenomena such as space weather, solar radio emissions, planetary eruptions in the solar system, pulsars, transient sources, and reionization of the early universe. This article introduces the HF-VHF frequency band multifunctional radio astronomical terminal system based on a dual-channel high-speed acquisition board with a frequency observation range of 1−250 MHz and a sampling rate of 500 Msps (Mega samples per second). The maximum quantization bit of the system is 14 bits, with a maximum time resolution of 0.1 s and a maximum spectral resolution of 16 kHz. The system combines spectral analysis of solar radio signals and recording of time-domain data of signals interfering with long baselines, and adopts a server-client separation mode to allow remote operation with separate permissions. It is used in the China-Malaysia joint astronomy project, which can carry out single-site observation of solar radio signals as well as interferometric observation of signals from multiple sites.

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First Joint Observations of Radio Aurora by the VHF and HF Radars of the ISTP SB RAS

Cited by 2 publications

References 23 publications

Statistical Model of Centimeter Range Signals That Have Passed The Surface and Space Propagation Path

Statistical Model of Centimeter Range Signals That Have Passed The Surface and Space Propagation Path

HF-VHF dual-channel multifunctional radio astronomy terminal system

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